About 400 different kinds of microbes live on and in the human body.
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During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
A woman's sense of smell is most sensitive during ovulation.
34
Fingernails grow nearly 4 times faster than toenails.
31
A toothbrush within 6 feet of a toilet can get airborne bacteria from flushing.
15
The tongue is the strongest muscle in the human body.
50
Your ribs move about 5 million times a year, every time you breathe!
60